Apk file runs on android device, but device view shows empty screen

Hi there
I am new to mobile app automation testing, and need help.

Using an apk file, I have managed to get my app running as expected on an attached mobile device, but the device view is a blank white screen, and the object hierarchy is displaying as follows


Any advice/help as to what’s happening would be appreciated.

RESOLVED - i just needed to click Capture Objects button and the objects appeared and the device view was the same as the actual device view.